High-stretch fabric provides an unrestricted range of motion Soft and gridded interiors offer comfort, coziness, and breathability Grid interiors offer insulation Regular fit with a crew-neck collar for easy layering under tech outerwear Seam placement avoids high-friction zones and offer unrestricted and convenient movement NRS Men's Lightweight Long Sleeve Shirt - The NRS Men's Lightweight Long Sleeve Shirt is the ultimate go-anywhere, do-it-all layer. The stretchy fleece is soft against the skin, delivering comfortable midweight insulation and sun protection.